South Korea · Grade 3 · Practice Sheet 42

1. 1.

   Continue the pattern by counting in 10s: 40, 50, ___

   Formula:Skip Counting

   $\text{next} = \text{term} + \text{step}$

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2. 2.

   What is double 7?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   Subtract 46 from 84.

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   There are 4 bags with 5 apples in each bag. How many apples are there in total?

   Formula:Multiplication as Repeated Addition

   $\text{total} = \text{groups} \times \text{size}$

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5. 5.

   How many tens are there in the number 32?

   Formula:Place Value

   $\text{value} = \text{tens} \times 10 + \text{ones}$

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6. 6.

   What is half of 36?

   Formula:Halving

   $h = n \div 2$

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7. 7.

   What is double 9?

   Formula:Doubling

   $d = 2 \times n$

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8. 8.

   How many tens are there in the number 94?

   Formula:Place Value

   $\text{value} = \text{tens} \times 10 + \text{ones}$

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9. 9.

   You have ₩8 and ₩3. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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10. 10.

    There are 5 bags with 4 apples in each bag. How many apples are there in total?

    Formula:Multiplication as Repeated Addition

    $\text{total} = \text{groups} \times \text{size}$

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11. 11.

    What is double 18?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    Subtract 22 from 49.

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    There are 5 bags with 5 apples in each bag. How many apples are there in total?

    Formula:Multiplication as Repeated Addition

    $\text{total} = \text{groups} \times \text{size}$

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14. 14.

    Subtract 32 from 71.

    Formula:Subtraction

    $\text{difference} = a - b$

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15. 15.

    What is 4 × 9?

    Formula:Multiplication (Times Tables)

    $\text{product} = a \times b$

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16. 16.

    Fill in the missing number: 8 + ___ = 23.

    Formula:Missing Addend

    $b = \text{total} - a$

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17. 17.

    There are 2 bags with 6 apples in each bag. How many apples are there in total?

    Formula:Multiplication as Repeated Addition

    $\text{total} = \text{groups} \times \text{size}$

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18. 18.

    Continue the pattern by counting in 10s: 20, 30, ___

    Formula:Skip Counting

    $\text{next} = \text{term} + \text{step}$

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19. 19.

    What is half of 16?

    Formula:Halving

    $h = n \div 2$

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20. 20.

    What is double 9?

    Formula:Doubling

    $d = 2 \times n$

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